AD774BKN Equivalent & Substitute Parts

Part Overview

The AD774BKN is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc., configured as a SAR (Successive Approximation Register) architecture device with 2 single-ended inputs and parallel data interface. The device operates with ±11.4V to 16.5V analog supply and 5V digital supply, housed in a 28-DIP package for through-hole mounting.

The AD774BKN is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this data acquisition component.

Substiute Parts

AD774BKN

Analog Devices Inc.In Stock: 1423AD774BKN Datasheet

Current PartRFQ

AD774BKNZ

Analog Devices Inc.In Stock: 1173AD774BKNZ Datasheet

DirectRFQ

MAX174ACPI+

Analog Devices Inc./Maxim IntegratedIn Stock: 779MAX174ACPI+ Datasheet

SimilarRFQ

MAX174BCPI+

Analog Devices Inc./Maxim IntegratedIn Stock: 698MAX174BCPI+ Datasheet

SimilarRFQ

MAX174CCPI+

Analog Devices Inc./Maxim IntegratedIn Stock: 750MAX174CCPI+ Datasheet

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MX574AJN+

Analog Devices Inc./Maxim IntegratedIn Stock: 1420MX574AJN+ Datasheet

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MX574AKN+

Analog Devices Inc./Maxim IntegratedIn Stock: 2293MX574AKN+ Datasheet

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MX674AJN+

Analog Devices Inc./Maxim IntegratedIn Stock: 2342MX674AJN+ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AD774BKN is determined by the following critical parameters:

• Resolution: 12-bit ADC capability
• Package / Case: 28-DIP form factor with 0.600" (15.24mm) body
• Mounting Type: Through-hole compatibility
• Data Interface: Parallel output configuration
• Architecture: SAR-based conversion
• Supply Voltage Compatibility: Analog and digital supply ranges

Substitute parts are grouped into two categories based on input configuration and supply voltage alignment:

Category 1 - Direct Functional Equivalent (AD774BKNZ): Maintains identical 2-input configuration with matching ±11.4V ~ 16.5V analog supply specification and active product status.

Category 2 - Single-Input Alternatives (MAX174 and MX574 Series): Provide 12-bit SAR ADC functionality in 28-DIP package with reduced input count (1 input) and alternative supply voltage specifications. These parts maintain core ADC resolution, architecture, and package compatibility but differ in input channel configuration and supply voltage ranges.

Category 3 - Higher Sampling Rate Alternative (MX674AJN+): Offers 12-bit SAR ADC with 66k sampling rate in 28-DIP package but is classified as obsolete.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: AD774BKNZ

The AD774BKNZ is the direct equivalent of the AD774BKN, maintaining identical electrical specifications including 2-input configuration, ±11.4V ~ 16.5V analog supply, and 5V digital supply. The AD774BKNZ is classified as active product status with ROHS3 compliance and REACH unaffected certification, ensuring long-term availability and regulatory compliance for new designs and production continuity.

Secondary Recommendation: MX574AKN+ or MX574AJN+

The MX574AKN+ and MX574AJN+ provide 12-bit SAR ADC functionality in 28-DIP package with active product status and ROHS3 compliance. These parts maintain the ±11.4V ~ 16.5V analog supply and 5V digital supply specifications matching the original AD774BKN. The primary design consideration is the reduction from 2 inputs to 1 input, requiring circuit-level evaluation for applications requiring dual-channel simultaneous sampling.

Alternative Consideration: MAX174 Series (MAX174ACPI+, MAX174BCPI+)

The MAX174 series offers 12-bit SAR ADC resolution in 28-DIP package with active product status and ROHS3 compliance. These parts operate with alternative supply voltage specifications (5V, -12V, -15V) and reduced operating temperature range (0°C ~ 70°C) compared to the AD774BKN (-40°C ~ 85°C). Selection requires verification of supply voltage availability and operating temperature requirements in the target application.

Not Recommended: MX674AJN+

The MX674AJN+ is classified as obsolete, presenting the same long-term availability risk as the original AD774BKN. While it offers higher sampling rate (66k), its obsolete status makes it unsuitable for new designs or production continuity strategies.

Frequently Asked Questions (FAQ)

Q: Can AD774BKNZ directly replace AD774BKN without circuit modification?

A: Yes. The AD774BKNZ maintains identical electrical specifications, pin configuration, and package form factor. Direct substitution is possible without circuit modification. The primary difference is product status (active vs. obsolete) and packaging format (tube vs. unspecified).

Q: What is the key limitation when using MX574AKN+ or MX574AJN+ as substitutes?

A: Both MX574 variants reduce input channels from 2 to 1. Applications requiring simultaneous dual-channel sampling require circuit redesign or external multiplexing. The 40k sampling rate is lower than typical SAR ADC performance but maintains compatibility with the original supply voltage specifications.

Q: Are MAX174 series parts suitable for -40°C to 85°C operating temperature applications?

A: No. The MAX174 series operates within 0°C to 70°C temperature range, which is narrower than the AD774BKN specification (-40°C ~ 85°C). Applications requiring extended temperature operation must use AD774BKNZ, MX574AKN+, or MX574AJN+.

Q: What compliance certifications apply to substitute parts?

A: AD774BKNZ, MAX174ACPI+, MAX174BCPI+, MAX174CCPI+, MX574AJN+, and MX574AKN+ are ROHS3 compliant and REACH unaffected. All parts maintain MSL 1 (Unlimited) moisture sensitivity classification.

Q: Is the 28-DIP package form factor identical across all substitute parts?

A: Yes. All substitute parts use 28-DIP (0.600", 15.24mm) package with through-hole mounting, ensuring mechanical compatibility with existing PCB designs.

Q: Can MX674AJN+ be used for new production designs?

A: No. MX674AJN+ is classified as obsolete, presenting the same availability and long-term support risk as the original AD774BKN. New designs should utilize active product alternatives such as AD774BKNZ or MX574 series.